feat: Implement API client and token models with hashing and JWT authentication

- Added ApiClientModel and ApiTokenModel for managing API clients and tokens.
- Introduced ConfigurationDefinitionModel and ConfigurationValueModel for configuration management.
- Created CredentialSecretModel for storing credential secrets.
- Developed DeploymentArtifactModel and DeploymentBatchModel for deployment management.
- Enhanced DeploymentTargetModel and DeploymentTemplateSelectionModel to support template revisions.
- Added TemplateRevisionModel and TemplateVersionModel for versioning templates.
- Implemented ApiClientSecretHasher for secure secret hashing.
- Created ApiTokenService for generating and validating JWT tokens.
- Updated QueueJobService to handle deployment requests with artifacts.
- Configured authentication settings in appsettings.json for JWT and Negotiate authentication.

.gitignore

@@ -4,17 +4,22 @@ obj/
 out/
 publish/
 artifacts/
+buildcheck/
+*.nupkg
+*.snupkg
 
 # Visual Studio / Rider / VS Code
 .vs/
 .idea/
 .vscode/.ropeproject
+.vscode/.ionide/
 *.user
 *.suo
 *.rsuser
 *.sln.docstates
 *.csproj.user
 *.csproj.lscache
+*.sln.DotSettings.user
 
 # .NET / test artifacts
 TestResults/
@@ -32,6 +37,8 @@ coverage.cobertura.xml
 *.cache
 *.bak
 *.orig
+*.pid
+*.pid.lock
 
 # Local configuration / secrets
 appsettings.Local.json
@@ -39,9 +46,12 @@ appsettings.*.local.json
 appsettings.*.Local.json
 *.secrets.json
 secrets.json
+*.kdbx
+*.key
 
 # EF / local tooling noise
 .ef/
+efbundle.exe
 
 # OS files
 .DS_Store
@@ -57,4 +67,10 @@ dist/
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
-pnpm-debug.log*
+pnpm-debug.log*
+
+# Keep source artifacts versioned:
+# - Context/DemoData*.cs
+# - Migrations/*.cs
+# - .tests/*.ps1
+# - Docs/**/*.md